Count Vowel Substrings of a String

Description

class Solution
{
    public int countVowelSubstrings(String word)
    {
        int vow = 0;
        int n = word.length();
        Set<Character> set = new HashSet<>();
        for(int i = 0; i < n-4; i++)
        {
            set.clear();
            for(int j = i; j < n; j++)
            {
                char ch = word.charAt(j);
                if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
                {
                    set.add(ch);
                    if(set.size() == 5){
                        vow++;
                    }
                        
                }else{
                    break;
                }
                    
            }
        }
        return vow;
    }
}